In terms of EHR systems, what is 'metadata'?

The definition of 'metadata' in the context of Electronic Health Record (EHR) systems focuses on its role in providing context and detail about the data itself. Metadata is essentially data about data, which means it offers information that helps describe other data within the EHR system. For example, it can include details about data sources, the format of the data, the date it was created, the author of the data, and how it can be used.

In an EHR system, metadata is crucial for data organization, retrieval, and understanding the significance of the health information contained within the records. By distinguishing various data elements, metadata enhances the usability and interoperability of EHR systems, making it easier for healthcare providers to access and understand patient information.

Other options provided do not accurately define metadata. For instance, data used solely for billing purposes refers to a specific category of health information, while patient health records stored in an external database and patient photographs and files pertain to specific data types rather than the broader concept of data about data.